(re-post)
I can remember both sending and receiving air mail letters similar to these and that was many many years ago, back in the Sixties.
So when I came across a bunch at a sale I trotted along to the post office and learned that I could indeed still send them – in Canada there is more than enough postage for them to go – by air, of course! – and I could even add a page or two inside.
To the US or abroad I would have to add extra stamps.
Next I googled to see when these would have been issued and came up with 1985 – but that was with 68 cents postage. Hmmm?
In any case it is going to be fun sending them to people.